<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator="/">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图 -->
        <el-card>
            <!-- 添加角色区域 -->
            <el-row>
                <el-col>
                    <el-button type="primary" @click="addRloseDialogVisible = true">添加角色</el-button> 
                </el-col>
            </el-row>

            <!-- 角色列表区域 -->
            <el-table :data="rolelist" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row :class="['bdbottom', i1 === 0 ? 'bdtop':'', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col> 
                            <!-- 渲染二级和三级权限 -->
                            <el-col :span="19">
                                <!-- 渲染二级权限 -->
                                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                                    <el-col :span="6">
                                        <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag v-for="item3 in item2.children" :key="item3.id" type="warning" closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                        <!-- <pre>{{scope.row}}</pre> -->
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column label="#" type="index"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                        <!-- 编辑按钮 -->
                        <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditRoleDialong(scope.row.id)">编辑</el-button>
                        <!-- 删除按钮 -->
                        <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeRoleById(scope.row.id)">删除</el-button>
                        <!-- 分配权限按钮 -->
                        <el-tooltip effect="dark" content="分配权限" placement="top-start" :enterable="false">
                            <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                        </el-tooltip>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>

        <!-- 分配权限的对话框 -->
        <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="40%" @close="setRightDialogClosed">
            <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 添加角色的对话框 -->
        <el-dialog title="添加角色" :visible.sync="addRloseDialogVisible" width="30%" @close="addRolseDialogClosed">
            <!-- label-width是设置前面文字的宽度的 -->
            <el-form :model="addRoleForm" :rules="addRloseFormRules" ref="addRloseFormRef" label-width="90px"> 
                <el-form-item label="角色名称:" prop="roleName" >
                    <el-input v-model="addRoleForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述:" prop="roleDesc">
                    <el-input v-model="addRoleForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="addRloseDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addRolse">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 编辑角色的对话框 -->
        <el-dialog title="编辑用户" :visible.sync="editRloseDialogVisible" width="30%" @close="editDialogClosed">
             <el-form :model="editFrom" :rules="editFormRules" ref="editFromRef" label-width="90px" >
                <el-form-item label="角色名称:" prop="roleName">
                    <el-input v-model="editFrom.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述:" prop="roleDesc">
                    <el-input v-model="editFrom.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editRloseDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editRoleInfo">确 定</el-button>
            </span>
        </el-dialog>
    </div>

</template>

<script>
export default {
    data() {
        return {
            // 所有角色列表数据
            rolelist: [],
            // 控制分配权限对话框的显示与隐藏
            setRightDialogVisible: false,
            rightslist: [],
            // 树形控件的属性绑定
            treeProps: {
                label: 'authName',
                children: 'children'
            },
            // 默认选中的权限的id值
            defKeys: [],
            // 当前即将分配角色的id
            roleId: '',
            // 控制添加角色对话框的显示与隐藏
            addRloseDialogVisible: false,
            // 添加角色的校验规则
            addRloseFormRules: {
                roleName: [
                    { required: true, message: '请输入角色名称', trigger: 'blur' },
                    { min: 3, max: 10, message: '长度在 3~10 个字符', trigger: 'blur' }
                ],
                roleDesc: [
                    { required: true, message: '请输入角色描述', trigger: 'blur' },
                    { min: 3, max: 10, message: '长度在 3~10 个字符', trigger: 'blur' }
                ],
            },
            // 添加角色的表单数据
            addRoleForm: {
                roleName: '',
                roleDesc: ''
            },
            // 控制编辑角色对话框的显示与隐藏
            editRloseDialogVisible: false,
            // 查询到的角色信息对象
            editFrom: {},
            // 编辑角色的校验规则
            editFormRules: {
                roleName: [
                    { required: true, message: '请输入用户名', trigger: 'blur' },
                    { min: 3, max: 10, message: '长度在 3~10 个字符', trigger: 'blur' }
                ],
                roleDesc: [
                    { required: true, message: '请输入用户名', trigger: 'blur' },
                    { min: 3, max: 10, message: '长度在 3~10 个字符', trigger: 'blur' }
                ],
            }
        }
    },
    // 生命周期函数
    created() {
        this.getRolesList();
    },
    methods: {
        // 获取所有角色的列表
        async getRolesList() {
            const { data: res } = await this.$http.get('roles');
            if ( res.meta.status !== 200) {
                return this.$message.error('获取角色列表失败！');
            }

            this.rolelist = res.data;
            // console.log(this.rolelist);
        },
        // 根据 id 删除对应的权限
        async removeRightById(role, rightId) {
            const confirmResult =  await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => { //catch捕获错误
                return err;
            });

            if (confirmResult !== 'confirm') {
                this.$message.info('已取消删除！');
            }

            const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`);
            if (res.meta.status !== 200) {
                return this.$message.error('删除权限失败！');
            }
            // 重新渲染局部信息
            role.children = res.data;
        },
        // 展示分配权限的对话框
        async showSetRightDialog(role) {
            // 角色的id
            this.roleId = role.id;

            // 获取所有权限的数据
            const { data: res } = await this.$http.get('rights/tree');

            if (res.meta.status !== 200) {
                return this.$message.error('获取权限数据失败！');
            }
            this.rightslist = res.data;
            // console.log(this.rightslist);

            // 递归获取三级节点
            this.getLeafKeys(role, this.defKeys);

            this.setRightDialogVisible = true;
        },
        // ***通过递归的形式，获取角色所有的三级权限的id
        getLeafKeys(node, arr) {
            // 如果当前 node 节点不包括 children 属性，则是三级节点
            if (!node.children) {
                return arr.push(node.id);
            }

            node.children.forEach(item => {
                this.getLeafKeys(item, arr);
            });
        },
        // 监听分配权限对话框的关闭事件
        setRightDialogClosed() {
            this.defKeys = [];
        },
        // 点击为角色分配权限
        async allotRights() {
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ];
            const idStr = keys.join(',');

            const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr });
            if( res.meta.status !== 200 ) {
                return this.$message.error('分配权限失败！');
            }
            this.$message.success('分配权限成功！');
            this.setRightDialogVisible = false;
            // 重新渲染页面
            this.getRolesList();
        },
        // 监听添加角色对话框的关闭事件
        addRolseDialogClosed() {
            this.$refs.addRloseFormRef.resetFields();
        },
        // 点击添加角色
        addRolse() {    
            this.$refs.addRloseFormRef.validate(async valid => {
                // console.log(valid);
                if (!valid) return this.$message.error('角色信息验证失败！');
                const { data: res } = await this.$http.post('roles', this.addRoleForm);
                if (res.meta.status !== 201) {
                    this.$message.error('添加角色失败！');
                }
                // 提示成功
                this.$message.success('添加角色成功！');

                // 关闭对话框
                this.addRloseDialogVisible = false;
                // 重新获取角色列表
                this.getRolesList();
            } );
        },
        // 点击展开编辑角色的对话框
        async showEditRoleDialong(id) {
            const { data: res } = await this.$http.get('roles/' + id);
            if (res.meta.status !== 200 ) {
                return this.$message.error('查询角色信息失败！');
            }        

            this.editFrom = res.data;            
            this.editRloseDialogVisible = true;
        },
        // 监听角色对话框的关闭事件
        editDialogClosed() {
            // 清除表单内容
            this.$refs.editFromRef.resetFields();
        },
        // 修改角色并提交
        editRoleInfo() {
            // 提交的信息进行预验证
            this.$refs.editFromRef.validate(async valid => {
                if (!valid) return this.$message.error('角色信息验证失败！');
                const { data: res } = await this.$http.put('roles/' + this.editFrom.roleId, {
                    roleName: this.editFrom.roleName,
                    roleDesc: this.editFrom.roleDesc
                });

                if (res.meta.status !== 200) {
                    return this.$message.error('更新角色信息失败！');
                }
                this.$message.success('更新角色信息成功！');
                // 关闭对话框
                this.editRloseDialogVisible = false;
                // 刷新角色数据列表
                this.getRolesList();
            } );
        },
        // 根据 id 删除对应的角色
        async removeRoleById(id) {
            // 弹出弹框提示
            const confirmResult =  await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => { //catch捕获错误
                return err;
            });

            if (confirmResult !== 'confirm') {
                return this.$message.info('已经取消删除！');
            }

            // 发送请求
            const { data: res } = await this.$http.delete('roles/' + id);
            if (res.meta.status !== 200) {
                return this.$message.error('删除角色失败！');
            }
            this.$message.success('删除角色成功！');
            // 刷新角色列表
            this.getRolesList();
        }
    }
}
</script>

<style lang="less" scoped>
// .expand {
//      !important;
//     // padding-left: 47px;
// }

.el-tag {
    margin: 7px;
}

.bdtop {
    border-top: solid 1px #eee;
}

.bdbottom {
    border-bottom: solid 1px #eee;
    margin-left: 47px;
}

.vcenter {
    display: flex;
    align-items: center;
}
</style>
